从非视图快速请求地理定位答案

【问题标题】：Swift request geolocation from non-view从非视图快速请求地理定位
【发布时间】：2017-03-26 20:54:32
【问题描述】：

我正在尝试在任意类中获取地理位置数据。我对 Swift 很陌生，所以我不知道为什么这不起作用？

有什么建议吗？

import Foundation
import UIKit
import CoreLocation

class GeolocationPlugin:NSObject, CLLocationManagerDelegate {
  var locationManager: CLLocationManager!
  var lat: Double = 0
  var long: Double = 0

  func getLocation() {
    print("Getting location")

    // For use in foreground
    self.locationManager = CLLocationManager()
    self.locationManager.requestWhenInUseAuthorization()
    self.locationManager.delegate = self
    self.locationManager.desiredAccuracy = kCLLocationAccuracyBest
//    locationManager.startMonitoringSignificantLocationChanges()


    func locationManager(manager: CLLocationManager!, didFailWithError error: NSError) {
      print("Error while updating location " + error.localizedDescription)
    }

    func locationManager(manager: CLLocationManager!, didUpdateLocations locations: [CLLocation]) {
      let locValue:CLLocationCoordinate2D = manager.location!.coordinate
      print("locations = \(locValue.latitude) \(locValue.longitude)")
    }


    self.locationManager.requestLocation()

    print("gets here")
  }
}

我目前看到Getting location，然后出现错误：

2017-03-26 15:42:32.634 IonicRunner[42304:5668243] *** Assertion failure in -[CLLocationManager requestLocation], /BuildRoot/Library/Caches/com.apple.xbs/Sources/CoreLocationFramework_Sim/CoreLocation-2100.0.34/Framework/CoreLocation/CLLocationManager.m:865
2017-03-26 15:42:32.638 IonicRunner[42304:5668243] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Delegate must respond to locationManager:didUpdateLocations:'

【问题讨论】：

标签： swift geolocation

【解决方案1】：

最终的解决方案是将方法移出getLocation()，以正确激活模拟器中的位置，并移动该类的启动位置，因此不会在getLocation() 立即发布完成。

import Foundation
import UIKit
import CoreLocation

class GeolocationPlugin:NSObject, CLLocationManagerDelegate {
  var locationManager = CLLocationManager()
  var lat: Double = 0
  var long: Double = 0
  var cb: ((Double, Double) -> Void)? = nil

  func getLocation(callback: @escaping (Double, Double) -> Void) {
    print("Getting location")

    // For use in foreground
    self.locationManager.requestWhenInUseAuthorization()
    self.locationManager.delegate = self
    self.locationManager.desiredAccuracy = kCLLocationAccuracyBest

    self.locationManager.requestLocation()
    self.cb = callback
  }

  func locationManager(_ manager: CLLocationManager, didFailWithError error: NSError) {
    print("Error while updating location " + error.localizedDescription)
  }

  func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
    let locValue:CLLocationCoordinate2D = manager.location!.coordinate
    //print("locations = \(locValue.latitude) \(locValue.longitude)")

    if( self.cb != nil) {
      self.cb!(locValue.latitude, locValue.longitude)
    }
  }
}

【讨论】：